exam Maths Puzzle Numerical Ability

graph the following functions on graph paper
f(x)=2x^2-3

y=(x+2)^2-4

y=(1/4)^x

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I have no clue where to even start on this problem. Please help. The text book does not provide any help!

Investigate the sum-of-the-cubes function Cn= 1^3 + 2^3 +3^3 +...+n^3 A candy store sells malted milk balls for $2.50 per pound, and chocolate-covered raisins for $3.75 per pound. How many pounds of each should be used to make a 10 pound mixture tha